MPC5634芯片发热

[liujian]

我参考网站上的MPC5634的设计 设计一个电路，发现MPC5634烫手，请问该如何解决，但是将PIn13引脚的对地电容22uf 和0.1uf  取下后芯片便不再发热，请问这个两个电容能否不焊接，但是不焊接时发现此管脚的电压波形为锯齿波附件是我的电路图，请指教！！

[PetrS]

Hi,

The VRC33 capacitors have to be used to bypass internal regulator.

Seems those are wrong. Have you measured the VRC33 when capacitors are placed?

Try to use different one.

BR, Petr

[liujian]

I change a few capacitance values are not the same tantalum capacitor, the voltage is 3.4 v，When I don't meet capacitor, the voltage is 4 v, but is the sawtooth waveform。

[trytohelp]

Hi,

Can I recommend you to post your question in English ?

Google Traduction:

Design Design MPC5634 my reference site on one circuit and found MPC5634 hot, how to fix it, but will PIn13 pin capacitance to ground 22uf and 0.1uf remove heat after the chip will no longer ask whether the two capacitors no welding, but when not welding found this pin voltage waveform sawtooth attachment is my schematic, please advise!

I moved the Question to hardware team.

Have a great day,
Pascal
Freescale Technical Support
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[liujian]

The translation above is my problem,Please help to solve!

thanks

[xingchaofu]

你好：

   你使用的是什么封装的芯片？确定pin13引脚是电源引脚吗？多少pin的？仔细核实下数据手册引脚定义

[liujian]

我使用的是176引脚的，13pin 不是电源引脚，那是网络标号，该引脚没有供电电源，而是对外提供电源。给下载口的上拉电阻提供电源